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notes_estom/Python/matplotlab/gallery/units/radian_demo.md
2020-09-26 22:03:11 +08:00

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# 弧度刻度
使用basic_units模型示例包中的弧度绘图。
此示例显示单元类如何确定刻度定位,格式设置和轴标记。
此示例需要[basic_units.py](https://matplotlib.org/_downloads/3a73b4cd6e12aa53ff277b1b80d631c1/basic_units.py)
![弧度刻度示例](https://matplotlib.org/_images/sphx_glr_radian_demo_001.png)
```python
import matplotlib.pyplot as plt
import numpy as np
from basic_units import radians, degrees, cos
x = [val*radians for val in np.arange(0, 15, 0.01)]
fig, axs = plt.subplots(2)
axs[0].plot(x, cos(x), xunits=radians)
axs[1].plot(x, cos(x), xunits=degrees)
fig.tight_layout()
plt.show()
```
## 下载这个示例
- [下载python源码: radian_demo.py](https://matplotlib.org/_downloads/radian_demo.py)
- [下载Jupyter notebook: radian_demo.ipynb](https://matplotlib.org/_downloads/radian_demo.ipynb)